Machine for dressing stone



UNITED sTATEs PATENT oEErcE.

MINER H. BACON, OF MYSTIC, CONNECTICUT.

MACHINE FOR DRESSING STONE.

Specification of Letters Patent No. 30,557, dated November 6, 1860.

To all whom it may concern:

Be it known that I, MINER H. BACON, of Mystic, in the county of NewLondon and State of Connecticut, have invented a new and usefulImprovement in Machines for Dressing Stones; and I do hereby declarethat the following is a full, clear, and exact description of the same,reference being had to the accompanying drawings, in which- Figures iand 2 are side elevations of the novel portions, Fig. 3 is a front viewof a portion, Fig. 4L is a view of the cutters and cutter bar on alarger scale.

Similar letters of reference indicate like parts in all the figures.

My invention relates to machines in which cutters are lifted by theaction of a revolving wiper turned by power and are allowed to act byfalling on the stone.

The nature of my invent-ion consists, first, in a certain arrangement ofmechanism for increasing the force of the blows given by the cutters,beyond that due to the action of gravity alone; second, in anarrangement of means of diminishing the force of such blows; third, in acertain arrangement of parts for suspending the action of the cutters atpleasure; fourth, in a certain method of adjusting several cutters inthe cutter frame so that all may cut to an equal depth, in combinationwith means for independ ently adjusting the inclination of cach cutter.

To enable others skilled in the art to make and use my invention I willproceed to describe its construction and operation by the aid of thedrawings.

Upon the frame A, A, which supports the revolving shaft. and wiper, arepermanent ways, B, B, upon which the sliding frame C, C, is free totraverse. On this frame, C, is mounted in boxes a vertical spindle Dupon which is fixed a cutter bar E carrying the cutter holder F. Uponthe same frame, C, is also mounted a vibrating frame Gr, having at oneend the segmental gearing I-I.

l This frame, Gr, carries also the springs J, K,

and vibrates around the pivot L, which connects it to C. The lever M isconnected to frame Gr at the point m, in such a manner that when theframe is depressed (by turning the hand wheel N which rotates thepinion, O, engaging in the segmental rack IAL) said lever M will becaused (by the action of the cutter bar, E, upon its arms, as may beseen in the drawings,) to press upon the spring K, and thus increase theforce of the blow, when the wiper, I), (rotated by the wheel, Q, whichreceives its motion from any convenient source of Vpower,) lets go thecutter bar, allowing it to drop by its own weight, aided by the pressureof the spring. If now, the oscillating frame G be elevated in a similarmanner the other spring will be brought in action by the same means, andthe force of the blow will be checked. But if it be further elevateduntil the stop R catches in a corresponding recess, the cutters willremain suspended above the surface of the stone.

Two or more cutters, S, are attached to the holder by means of thesleeves T and the screws, U, thus enabling them to be adjusted so as tocut the same depth, though they may wear unequally. Only one of thesecutters S, sleeves, T, and screws U, is shown. The other or others areprecisely like the one represented, and are supposed to stand directlybehind the one represented. Great nicety is requisite in thisadjustment, as the lines used in dressing mill stones, for which mymachine is peculiarly adapted, are often less than one one-hundredth ofan inch in depth.

It will readily be seen that by properly setting the screws IV, X, Y,the edge of the cutters when slightly inclined to the axes thereof, (asthey invariably will be through bad workmanship,) can be adjusted to aline parallel with the surface of the stone.

Having now fully described my invention,

what I claim as new therein and desire to secure by Letters Patent isl.The arrangement of the vibrating frame, G, with the lever, M, and thespring K for increasing the force of the blows, at pleasure, beyond thatdue to gravity alone.

2. The employment of the checking spring, QI, in combination with thevibrating frame Gr and lever M or their equivalents, sub stantially asherein described, for diminishing the force of the blows at pleasure,below that due to gravity.

3. The arrangement of the recess, 71, in the vibrating frame, Gr, thestop, R, on the sliding frame, C, and of the gearing, H and O,substantially as and for the purpose herein set forth.

'2 Y Y Y 30,557

4. The employment of the sleeves, T, op-

erated by the screws, U, or their equivalents,

In Witness whereof I have hereunto set my name 1n presence of tvvosubscribing Witmesses.

f MINER H. BACON. Witnesses:

I. S. SCHOONOVER, J. WATROUS, Jr.

